Combustion Definition and 363 Threads

Hey Y'all, As some of you might know I do combustion research I took high speed images of a spherically expanding flames. Look what happens at high pressure. The flame brakes up into cells. Is there anybody that is a photo expert and that can give me advise on how to improve these images...

This is an attempt to calculate the efficiency of a modern gasoline engine (Volkswagen's 1.6 litre FSI). The result seems too good to be true. Please let me know if there is any error. At a constant 100 km/h on a flat motorway, the consumption of my car reads 5.7 l/100 km. The engine revs...

An internal combustion engine runs on octane, the enthalpy of combustion is -5512 kJ/mol. The mass of 1 gallon of fuel is 3 kg. The engine temperature is 2000 degrees C and the exit temperature is 800 degrees C. What is the work done? The total enthalpy is -145053 kJ. The total number of...

For a project in my combustion class, I have to do a review paper on an area of combustion research. I don't know a lot about this field or the technologies that are at the forefront, so I was hoping the people on this board could help me out. I'm kind of a sci-fi geek, so I would like...

Combustion reaction -- discrepancy between hand calc. and computer sim I am considering the reaction C2H4O (liquid) --> CO + 0.5CH4 + 0.5H2 + 0.25C2H4 I calculated the flame temperature when the reactant is at 298 K and 20 atm using H(reactants) = H(products) to get Tfinal = 945 K. I then...

Homework Statement Calculate the flame temperature of normal octane (liquid) burning in air at an equivalence ration of 0.5. All reactants are at 298 K and the system operates at the pressure of 1 atm. Homework Equations Hp = Hr The Attempt at a Solution I know that the...

[SOLVED] What is the enthalpy of combustion of magnesium? Homework Statement Determine the enthalpy of combustion of Magnesium. Mg + 1/2O2 --> MgO magnesium + half oxygen -> magnesium oxide. The Attempt at a Solution I am not sure how to calculate this since I don't know where...

Hey. We have an assignment where we're investigating combustion of types of 'fuels'. I chose 4 alcohols- ethanol, methanol, propanol and octanol. I did a few experiments, with one testing the heat produced Could you please explain the formula for the heat value- not quite sure what its...

Homework Statement How many grams of methane (CH4 (g)) must be combusted to heat 1,200 grams of water from 26.0 degrees Celsius to 87.0 degrees Celsius, assuming water is in liquid state as a product and 100% efficiency in heat transfer? Given data: mass of H2O = 1.20 kg specific heat...

what is needed for combustion? I have this experiment NH4NO3 reacts to form (with chlorine as catalyst) N2O and water the experiment is called oxidation of zinc, so another equation is Zn and NH4NO3 react to form ZnO and water. Anyways, the result is a blue flame and smoke Combustion...

what is needed for combustion? I have this experiment NH4NO3 reacts to form (with chlorine as catalyst) N2O and water the experiment is called oxidation of zinc, so another equation is Zn and NH4NO3 react to form ZnO and water. Anyways, the result is a blue flame and smoke Combustion...

Homework Statement When 2.66 grams of a compound containing only carbon, hydrogen, and oxygen is burned completely, 4.50 grams of CO2 and 1.10 grams of H2O are produced. What is the empirical formula of the compound? Answer Options: C5H6O4 C5H6O5 C5H12O5 C4H6O3 C4H8O3 C3H4O3 C4H4O5...

Enthalpy of Combustion -- Alkanes Write a balanced equation for the combustion of CH4(g) (methane) (its reaction with O2(g) forming the products CO2(g) and H2O(l)). Given the following standard heats of formation: \DeltaHf° of CO2(g) is -393.5 kJ/mol \DeltaHf° of H2O(l) is -286 kJ/mol...

How can I design an internal combustion engine especially with connecting rod?

I was thinking. Now people plan to build factories to transform wood to liquid fuels. But why not run a motor on solid fuel. A diesel spread diesel to a fine particle dust so it burn faster and better. But you can get a explosion by sawdust. Is it not possible to get sawdust into the...

for eg. combustion of CH4: CH4(g) + 2O2(g) ---> CO2(g) + 2H2O(l) enthalpy of combustion: (-393.51) + 2(-241.82) - (-74.81) = -802.34 kj/mol energy output per unit mass: 802.34 x 1000/16(molar mass) = -50146.25 kj/kg energy output per unit volume: -50146.25 x 0.645(mass density) =...

Homework Statement Calculate the heat of combustion for C2H6 from the following information: C2H4+ 3O2----> 2 CO2 + 2 H2O (-1409.5kJ) C2H4 + H2 ----> C2H2 (-136.7 KJ) H2 + 1/2 O2 -----> H2O ( -285.5 kJ) The Attempt at a Solution C2H6 --> C2H4 + H2 +136.7kJ C2H4 + 302...

As most of you are probably aware, A 'new' gas is being studied to be burned in gas turbine (DLE) combustors. Syngas which is a mixture of CO and H2. I am currently involved with experiments investigating the burning characteristics of this gas. However, we premix our gas in a stainless steel...

You burn 103.4 mg of phenol in a calorimeter of heat capacity 1,483 J K-1 and the temperature rises by 1.83 oC. Determine the molar heat of combustion for phenol in kJ mol-1. The molar mass of phenol is 94.12 g mol-1 Ccal=deltaH/ deltaT This is what I did. n=.1034/94.12 =1.09859E-3mol...

Hey what if you had a certain volume of hydrogen gas in two different scenarios. They are of equal amounts. In one scenario, the hydrogen is ignited so that it explodes instantaneously. In the other scenario, the (equal amount of) hydrogen is used in a thrust engine for an extended period of...

Hi again, I was doing some experiments on heat of combustion of various fuels and determine which fuel is better by creating a calorimeter. And its simple and straight forward but i started thinking what happens to the water created by burning the fuel, as an example i was doing methanol and...

Hi everyone, We have an argument about gasoline combustion engine and diesel engine. Some say, the diesel engine is stronger than gasoline one. My idea is if the two engines are the same dimension, they must have the same power. Am I right or wrong. Thanks

hello everybody here in that great,full&useful forum, well--im a student in the final year of mechanical engineering,and i was really interested in the whole courses we had taken at school related to the subject of comustion,and i know abit about the techniques of the electronic boeards and...

Acetylene (C2H2) is burned with a stoichiometric amount of air during a combustion procss. Assuming complete combustion, determine the air-fiel ratio on a mass and mole basis. I'm not asking for help on the actual question I just don't know what the basic chemical equation is? C2H2 +...

What I am getting at is I would like to find out the psi of some engines. Is there a formula(s) to get good estimates or exactness of the pressure made in a cylinder. For example, you would need the cubic inch, static compression, cam specs, etc...and at a given position of the piston get...

Homework Statement Does combustion reactions always result in water and carbon dioxide being formed, can it just have water or just carbon dioxide, or does water and carbon dioxide not need to be products. Furthermore would Iron(II)oxide(s) + oxygen(g)--> iron(III)oxide(s) be considered a...

i recently heard that ups is designing and testing a hydraulic system to power a torque converter for an efficient delivery system i need to know the validity of the situation and the plausibility of it being run by an electrically powered motor.

Does anybody has any comment on this? What might cause it? B/c I don't want to explode. lol

I am needing help on some homework questions: A 2.200 g sample of quinone, C6H4O2, is burned in a bomb calorimeter whose total heat capacity is 7.854 kJ/ degrees C. The temperature of the calorimeter increases from 23.50 degrees C to 30.63 degrees C. 1. What is the HEAT OF COMBUSTION PER...

What I have to do is find out which fuel would be best to use as an automotive fuel. My choices are methanol ethanol and propanol. My guess so far is propanol because it has a molar enthalpy of combustion of 2021kJ/mol which is close to double ethanol (1367kJ/mol) but it needs much more...

hey guys , i am studying about the old combustion chambers. i came across the L head combustion chamber and am confused about the exact position of the spark plug.so please help me out of this.

Hello, I have been assigned to do an information search on the Combustion Engine. I have to find 5-10 articles detailing how combustion engines incorporate physics principles. I have looked around for articles but haven't found much. What principles are incorporated in the combustion engine...

Hey, I have to know how I am going to do this by tomorrow...I have to find out some way to measure the heat energy given off by the combustion of various batches of biodiesel that I have made for Physics/Chemistry. I can't just light the fuel, because it would explode and I wouldn't be able...

Hey guys ,can u just let me know about the most advanced or developed IC engine.Plz help.

1) A combustion cylinder (containing a fixed number of moles of gas initially at 9.00atm ) with a moveable piston is maintained at a constant temperature changes volume from 2.00 L to 6.0 L. Determine the change in pressure during this action. P1 = 9.00 atm V1 = 2.00 L P2 = ? V2 = 6.0 L...

This may be the wrong forum, so mods please move if necessary (and forgive my error :) ). I was trying to research combustion temperatures (for a typical four stroke engine) as they relate to air/fuel ratio (AFR). I have googled my butt off, and I read many interesting things. But, I still...

In an SI engine, according to the book Internal Combustion Engine Fundamentals, knocking is produced due to the interaction of the shock wave and the expansion wave which together produce very high amplitude standing waves. My question is, in knocking is there only one shock wave or multiple...

"SYDNEY (Reuters) - An Australian man built up a 40,000-volt charge of static electricity in his clothes as he walked, leaving a trail of scorched carpet and molten plastic and forcing firefighters to evacuate a building." http://news.yahoo.com/s/nm/australia_electricity_dc

Has enyone (in the realm of fiction even) proposed making an enourmous piston engine that would use nuclear weapons instead of atomized hydrocarbons? (Sure, it would have to be BIG. But its possible, no?)

Determine the heat of combustion of methane (CH4(g)) by writing a balanced equation and using the bond energies indicated below. C--H = 414 KJ/mol O==O = 502 KJ/mol C==O = 799 KJ/mol O--H = 464 KJ/mol ________________ I've googled it and apparently the answer is -890 KJ/mol but when...

Hi guys can you please check if this is right...thanks in advance The heat released by the reaction 2C + 2H2 = CH4 is 74.8kJ/mol. Using this information and a table of standard enthalpy of formation values, determine the heat of combustion for the burning of methane to form CO2 and H2O(g)...

I had an interesting situation at work. One of the Faculty has a very large plastic planter filled with store bought soil. It has appearantly been sitting outdoors unused for quite some time and has become incredibly dried out with some dry dead plant material still mixed in. Yesterday there...

The complete combustion of RDX is 2C3H6N6O6 + 302 --> 6H2O + 6CO2 + 6N2. How much heat is liberated from the complete combustion of 10g of RDX? delta H values: H20 = -286, CO2 = -394, RDX = +65 (all in kJ/mol) I thought it'll be (6*-286 + 6*-394) - (2*65) = -4210 kJ/mol Then divide...

Is there away tio reduce the smoke produced in a [combustion] reaction? Theoretically, there is no smoke produced at all (only water and carbon dioxide), but because of the impurities, imcomplete combustion, moisture, obviously, smoke is a common product of burning something. How can I...

This is a pretty cool site... I decided to register and ask my very first question... I am developing an Excel Spreadsheet tool for learning purposes which demonstrates effects on power generation of automobile engines by changing various specifications like charge temperature, rpm, bore...

Calculate the heat of combustion for C2H6 from the following information: C2H4 + 3 CO2 --> 2 CO2 + 2 H2O /\H f -1409.5 kJ C2H4 + H2 --> C2H2 /\H f - 136.7 kJ H2 + 1/2 O2 --> H2O /\H f - 285.5 kJ i saw someone else ask this question and they were referred to look at...

What is spontaneous combudtion? does it kill? And, what does it look like?

Hello I am trying to solve this question and have been stumped for quite a while. Can some tell me the steps I have to take in order to solve this. Question Calculate the heat of combustion for C2H6 from the following information: C2H4+ 3O2----> 2 CO2 + 2 H2O -1409.5kJ C2H4...

A 0.196 g sample of quinone (C6H4O2) is burned in a bomb calorimeter that has a heat capacity of 1.56 kJ/C. What is the heat of combustion (kJ/mol) if the temperature increases by 3.2 C? -I have no idea how to do this problem...

My friend and I are stuck on a lab-work, where we are to find the enthalpy of combustion for stearic acid. Does anyone know the reaction formula for the combustion of stearic acid?